12121245 has 30 divisors (see below), whose sum is σ = 21854778. Its totient is φ = 6427296.

The previous prime is 12121231. The next prime is 12121267. The reversal of 12121245 is 54212121.

It can be written as a sum of positive squares in 3 ways, for example, as 6260004 + 5861241 = 2502^2 + 2421^2 .

It is not a de Polignac number, because 12121245 - 2⁸ = 12120989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 69979 + ... + 70151.

Almost surely, 2^12121245 is an apocalyptic number.

12121245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12121245 is a deficient number, since it is larger than the sum of its proper divisors (9733533).

12121245 is an frugal number, since it uses more digits than its factorization.

12121245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 181 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12121245 is about 3481.5578409672. The cubic root of 12121245 is about 229.7113265578.

Adding to 12121245 its reverse (54212121), we get a palindrome (66333366).

The spelling of 12121245 in words is "twelve million, one hundred twenty-one thousand, two hundred forty-five".